Watch casing



FIG. 1 is a top view of a watch casing;

FIG. 2 is a bottom view of the watch casing of FIG. 1;

FIG. 3 is a front end view of the watch casing of FIG. 1;

FIG. 4 is a back end view of the watch casing of FIG. 1;

FIG. 5 is a right side view of the watch casing of FIG. 1; and,

FIG. 6 is a left side view of the watch casing of FIG. 1. 

The ornamental design for a watch casing, as shown and described. 